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The ethanolic and aqueous extracts of Nymphaea stellata flower was screened for antioxidant activity using 1,1-diphenyl-2-picryl hydroxyl (DPPH) quenching assay, Hydroxyl Radical Scavenging Activity, Nitric Oxide Scavenging activity using established assay procedures. The extracts exhibited high antiradical activity against DPPH, nitric oxide and hydroxyl radicals. The FRP increased with increasing concentration of the sample. Ethanolic extract showed more scavenging activity than the aqueous extract. The antioxidant activity of the extract was comparable with that of the standard.